Dell PowerEdge 4300 Dell PowerEdge 4300 Systems User's Guide - Page 101

I/O Ports and Connectors

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This appendix provides specific information about the input/output (I/O) ports and connectors on the back panel of the computer system. The I/O ports and connectors on the back panel of the system are the gateways through which the computer system communicates with external devices such as a keyboard, mouse, printer, and monitor. Figure B-1 identifies the I/O ports and connectors for your system. The two built-in serial ports use 9-pin D-subminiature connectors on the back panel. These ports support devices such as external modems, printers, plotters, and mice that require serial data transmission (the transmission of data one bit at a time over one line). Most software uses the term COM (for communications) plus a number to designate a serial port (for example, COM1 or COM2). The defaults for your system's built-in serial ports are COM1 and COM2. The built-in parallel port uses a 25-pin D-subminiature connector on the system's back panel. This I/O port sends data in parallel format (where eight data bits, or one byte, are sent simultaneously over eight separate lines in a single cable). The parallel port is used primarily for printers. Most software uses the term LPT (for line printer) plus a number to designate a parallel port (for example, LPT1). The default for the system's built-in parallel port is LPT1. I/O Ports and Connectors B-1

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I/O Ports and Connectors
B-1
$33(1’,;²%
±
,»2±3RUWV±DQG±&RQQHFWRUV
This appendix provides specific information about the input/output (I/O) ports and con-
nectors on the back panel of the computer system.
,»2±3RUWV±DQG±&RQQHFWRUV±±
The I/O ports and connectors on the back panel of the system are the gateways
through which the computer system communicates with external devices such as a
keyboard, mouse, printer, and monitor. Figure B-1 identifies the I/O ports and connec-
tors for your system.
6HULDO±DQG±3DUDOOHO±3RUWV±
The two built-in serial ports use 9-pin D-subminiature connectors on the back panel.
These ports support devices such as external modems, printers, plotters, and mice
that require serial data transmission (the transmission of data one bit at a time over
one line).
Most software uses the term
COM
(for communications) plus a number to designate a
serial port (for example, COM1 or COM2). The defaults for your system’s built-in serial
ports are COM1 and COM2.
The built-in parallel port uses a 25-pin D-subminiature connector on the system’s back
panel. This I/O port sends data in parallel format (where eight data bits, or one byte,
are sent simultaneously over eight separate lines in a single cable). The parallel port is
used primarily for printers.
Most software uses the term
LPT
(for line printer)
plus a number to designate a parallel
port (for example, LPT1). The default for the system’s built-in parallel port is LPT1.